Friction spring draft-rigging.



PATENTED FEB. 14, 1905.

P. N. MOORE. FRICTION SPRING DRAFT RIGGING.

APPLICATION FILED SEPT.B, 1904.

2 SHEETS-SHEET 1 WITNESSES.-

No. 782,791. PATENTED FEB. 14, 1905. P. N. MOORE. FRICTION SPRING DRAFT RIGGING.

APPLICATION FILED SEP'LB, 1904.

2 BHEETS SHEET 2.

W1 TNESSES: INVENTOR. .2173. W a Pe e flf/Waare Patented February 14, 1905.

PATENT OFFICE.

PETER N. MOORE, OF MILWAUKEE, WISCONSIN.

FRICTION SPRING DRAFT-RIGGING.

SPECIFICATION forming part of Letters Patent No. 782,791, dated February 14, 1905.

Application filed September 8, 1904. Serial No. 223,717.

To all whom it may concern:

Be it known that I, PETER N. MOORE, a citizen of the United States, residing in the city of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Improvement in Friction Spring Draft-Rigging, of which the following is a specification.

My invention relates to improvements in friction spring draft-rigging for railway-cars.

The object of my invention is to provide a friction spring draft-rigging of a simple, strong, efficient, and durable construction adapted to exert a very great frictional resistance in connection with a direct-acting spring resistance longitudinally arranged in the line of draft.

My invention consists in the means I employ to practically accomplish this object or resultthat is to say, it consists, in connection with a draw-bar, draw bar extension, side plates or stop castings, followers, and a longitudinally-arranged spring, a sliding friction-shell having an interior friction-surface, an internal friction-slide, preferably in the form of a four-winged spider, and a plurality of sets of sliding friction-blocks having interengaging inclined spreader-faces for forcing one set of said sliding friction-blocks into close frictional engagement with the internal friction-slide or spider and for forcing the other set of sliding friction-blocks outwardly into close frictional engagement with the surrounding friction-shell.

My invention also consists in the novel construction of parts and devices and in the novel combinations of parts and devices herein shown or described.

In the accompanying drawings, forming a part of this specification, Figure 1 is a central longitudinal vertical section of a friction draft-rigging embodying my invention. Fig. 2 is a horizontal section. Fig. 3 is a partial cross-section on line 3 3 of Fig. 2. Fig. i is a detail elevation of the wedge-cap. Fig. 5 is a detail perspective view of the internal friction-slide or spider, and Fig. 6 is a detail perspective view of the friction-shell.

In the drawings, A represents the draft or center sills of a car; A, the front or cross sill;

C, the coupler; B, the draw-bar, and B the draw-bar extension or strap, secured to the draw-bar by bolts or rivets b.

D D are the side plates or stop-castings, having front and rear stops (Z (Z for the followers E E to abut against and upper and lower guides 6Z3 for the followers to reciprocate on or between, the upper guide (Z be ing preferably integral with the stop-casting and the lower guide (Z in the form of a removable plate secured in place by bolts d to permit the ready insertion and removal of the draft-rigging from the car.

F is a longitudinally-arranged spring directly behind the draw-bar and in the line of draft, there being also preferably a small spring f nesting within it.

F isaspring seat-block interposed between the rear end of the spring and the -rear follower E and having a shoulder or flange f to engage the-internal shoulder or flange at the rear end of the friction-shell.

G is a sliding friction-shell having an interior friction-surface g, the same being preferably of substantially cylindrical form and provided with feet or projections g to rest and slide upon the lower guide d of the stopoastings D. Thefriction-shell G is also provided at its rear end with an internal shoulder or flange which engages the shoulder or flange f on the spring seat-block F.

G is an internal friction-slide, preferably in the form of a four-armed or four-winged spider and secured to the shell by pins g. The friction-shell G is preferably provided with longitudinal slots g in which the wings or arms of the internal friction-slide G fit. The internal friction-slide or spider Gr thus divides the friction-shell Gr into four chambers or sectors.

H and H are two sets of sliding segmental friction-blocks, the set of blocks H having exterior friction-faces 7t engaging the interior friction-faces g of the friction-shell G and the inner set of friction-blocks H having each friction-faces h it engaging the friction-faces g g of the internal friction-slide or spider G. The friction-blocks H H each have intercngaging inclined spreader-faces 7& to cause the outer set of friction-blocks H to be forced outwardly into close frictional engagement with the surrounding friction-shell and the inner set of friction-blocks H to be forced inwardly into close frictional engagement with the internal friction-slide or spider G when the draw-bar is moved in either direction under pulling or bufiing strains.

M is a wedge-cap furnished with inclined faces 7)), engaging the inclined faces hi on the inner set of sliding friction-blocks H. The wedge-cap M is also provided with slots or notches m to accommodate the arms or wings of the friction-slide or spider G, and the wedge-cap M. is further provided with longitudinal ribs m which lit in corresponding registering slots 9 in the friction-shell G to keep the wedge-cap in proper position or register radially with the outer set of frictionblocks H. The wedge-cap M is also provided with a rim or shoulder m, which may engage the end of the friction-shell G, and thus limit the inner movement of the wedge-cap and preventthe spring from being compressed beyond its proper limit.

The operation is as follows: In buffing, the rear follower is held stationary by the rear stops on the side plates D and the front follower moves with the draw-bar, and thus causes first an initial compression of the spring F until the friction-shell G abuts at its rear end against the rear follower, and then the further rearward movement of the draw-bar causes the set of friction-blocks H to frictionally slide against the friction-shell and the other set of friction-blocks, H, to frictionally engage and slide upon the internal friction-slide or spider G, thus producing a powerful frictional resistance by reason of the interengaging wedging or spreader faces it on the friction-blocks H H and by the interengaging inclined or wedging faces on the wedge-cap M and the friction-blocks H. In pulling, the operation is the same, but the reverse, the front follower, wedge-cap M, and friction-blocks H H being held against longitudinal movement with the draw-bar by the front stops on the side plates D, while the rear follower, friction-shell (Jr, and friction-slide G move with the draw-bar after the initial compression of the spring F takes place, when the rear follower engages the rear end of the friction-shell G.

I claim 1. In a friction spring draft-rigging, the combination with the draw-bar, draw-bar extension, longitudinally-arranged spring, followers and side plates or stop-castings, of a sliding friction-shell having an interior friction-surface, a friction-slide or spider inside said shell dividing the same into compartments, two sets ofsliding friction-blocks, one set having exterior friction-faces engaging the interior friction-surface of the shell, and the other set having friction-faces engaging the friction-faces of said internal friction-slide or spider, said friction-blocl s having interengaging inclined or wedging faces and a wedge-cap having inclined faces engaging the inclined faces on one set of said frictionblocks, substantially as specified.

2. In a friction spring draft-rigging, the combination with the draw-bar, draw-bar extension, longitudinally-arranged spring, followers and side plates or stop-castings, of a sliding friction-shell having an exterior friction-surface, a friction-slide or spider inside said shell dividing the same into compartments, two sets of sliding friction-blocks, one set having exterior friction-faces engaging the interior friction-surface of the shell, and the other set having friction-faces engaging the friction-faces of said internal friction-slide or spider, said friction-blocks having interengaging inclined or wedging faces and a wedgecap having inclined faces engaging the inclined faces on one set of said friction-blocks, said friction-shell having longitudinal slots to receive the wings or arms of said internal friction-slide or spider, substantially as specified.

3. In a friction spring draft-rigging, the combination with the draw-bar, draw-bar extension, longitudinally-arranged spring, followers and side plates or stop-castings, of a sliding friction-shell having an interior friction-surface, a friction-slide or spider inside said shell dividing same into compartments, two sets of sliding friction-blocks, one set having exterior friction-faces engaging the interior friction-surface of the shell, and the other set having friction-faces engaging the friction-faces of said internal friction-slide or spider, said friction-blocks having interengaginginclined or wedging faces and a wedgecap having inclined faces engaging the inclined faces on one set of said friction-blocks, said wedge-cap having slots or notches to receive the internal friction-slide or spider, substantially as specified.

t. In a friction spring draft-rigging, the combination with the draw-bar, draw-bar extension, longitudinally-arranged spring, followers and side plates or stop-castings, of a sliding frictionshell having an exterior friction-surface, a friction-slide 01' spider inside said shell dividing the same into compartments, two sets of sliding friction-blocks, one set having exterior friction-faces engaging the interior friction-surface of the shell, and the other set having friction-faces engaging the friction-faces of said internal friction-slide or spider, said friction-blocks having interengaging inclined or wedgin g faces and a wed gecap having inclined faces engaging the inclined faces on one set of said friction-blocks, said friction-shell having longitudinal slots to receive the wings or arms of said internal friction-slide or spider, and said wedge-cap having slots or notches to receive said internal fraction-slide or spider, substantially as speci 10C.

5. In a friction spring draft-rigging, the combination with the draw-bar, draw-bar extension, longitndinally-arranged spring, followers and side plates or stop-castings, of a sliding friction-shell having an exterior friction-surface, a friction-slide or spider inside said shell dividing the same into compartments, two sets of sliding friction-blocks, one set having exterior friction-faces engaging the interior friction-surface of the shell, and the other set having friction-faces engaging the friction-faces of said internal friction slide or spider, said friction-blocks having interengaging inclined or wedging faces and a wedgecap having inclined faces engaging the inclined faces on one set of said friction-blocks, said friction-shell having longitudinal slots to receive the wings or arms of said internal friction-slide or spider, and said wedgecap having slots or notches to receive said internal friction-slide or spider, said wedge-cap being provided with internal longitudinal ribs, and said friction-shell having longitudinal slots to receive said ribs on said wedge-cap, substantially as specified.-

6. In a friction spring draft-rigging, the combination with a longitudinally arranged spring and followers, of a friction-shell, a friction-slide inside the shell, sliding friction blocks having interengaging wedging-faces, one set of said friction-blocks having frictionfaces engaging the shell, the other set having friction-faces engaging said inside frictionslide, and a wedge-cap engaging one set of said friction-blocks, substantially as specified.

7 In a friction spring draftrigging, the combination with a longitudinally-arranged spring and followers, of a friction-shell, a friction-slide inside the shell, sliding frictionblocks having interengaging wedging-faces, one set of said friction-blocks having frictionfaces engaging the shell, the other set having friction-faces engaging said inside frictionslide, and a wedge-cap engaging one set of said friction-blocks, and a spring seat-block interposed between the spring and one of the followers and havinga shoulder engaging a shoulder on the sliding friction-shell, substantially as specified.

8. In a friction spring draft-rigging, the combination with a longitudinally-arranged spring and followers, of a friction-shell, a friction-slide inside the shell, sliding frictionblocks having interengaging wedging-faces, one set of said friction-blocks having frictionfaces engaging the shell, the other set having friction-faces engaging said inside frictionslide, anda wedge-cap engaging one set of said frictionblocks,said wedge-cap being provided with longitudinal registering ribs, and said shell having longitudinal slots to receive said ribs, substantially as specified.

9. In a friction spring draftrigging, the combination with a longitudinally arranged spring and followers, of a friction shell, a friction-slide inside the shell, sliding frictionblocks having interengaging wedging-faces, one set of said friction-blocks having frictionfaces engaging the shell, the other set having friction faces engaging the inside frictionslide, and a wedge-cap engaging one set of said friction-blocks, said wedge-cap having slots or notches to receive said internal friction-slide, substantially as specified.

10. In a friction spring draft-rigging, the combination with a longitudinallyarranged spring and followers, of a friction shell, a friction-slide inside the shell, sliding frictionblocks having interengaging wedging-faces, one set of said friction-blocks having frictionfaces engaging the shell, the other set having friction-faces engaging said inside frictionslide, and a wedge-cap engaging one set of said friction-blocks, said friction-shell having longitudinal slots to receive said internal frictionslide, substantially as specified.

PETER N. MOORE.

Witnesses:

PEARL ABRAMS, WILLIAM A. GEIGER. 

